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Keywords: coal coating
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Proceedings Papers
Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-087
... conducted on discontinuities in shale and sandstones. These were partly weathered and sometimes coated by coal. Friction angles range from 10° for coal-coated joints in sandstone to 40° clean joints in sandstone. The discontinuities were scanned with a 3D laser scanner for estimating the surface roughness...
